kirchhoff



' Dec: 25, 1928. Re. 17,169

W. G. KIRCHHOFF DOUGH MIXER Original Filed Feb. 21. 1922 s sheets-sheet 1 WILLIAM G. KIRCHHOFE Dec 25, 1928. Re. 17,169

w. G. KIRCHHOFF DOUGH MIXER Original Filed Feb. 21. 1922 5 Sheets-Sheet 2 31 mm Mot WILL/AM G KIRCHHOFF,

Dec. 25, 1928.

G. KIRCHHOFF DOUGH MIXER 5 Sheets-Sheet Original Filed Feb. 21. 1922 gnlm'nfoc WILLIAM G. K mcunorr,

V I film: It,

Dec. 25 1928. v I

W. G. KIRCHHOFF DOUGH MIXER Original Filed Feb. 21. 1922 5 sh ets-Sheet 4 WILLIAM anus-Hm; G. Kmcnnorg w. G. KIRCHHOFF Dec. 25, 1928.

DOUGH MIXER Original Filed Feb., 21. 1922 5 Sheets-Sheet 5 gnumflot WILLIAM G. KIRCHHOFE Reissued Dec. 25; 1928.

- UNlT'E-D s-TA TBS l F Re. 17,169 FICE.

WILLIAM G. KIRCHHOFF, OIL CINCINNATI, OHIO; ASSIGNOR TOIIJHE J. H. DAY COH- PAKY, OI OINCWNA TI; OHIOjIA ;CORPORATION' OF OHIO.

DOUGH MIXER.

Original No. 1,481,558; dated January 22, 1 924',-'Ser1al No. 588,309,?flle'd 'I'ebruary 21, 1922. ;Application a for reissue filed March 31, 1924. Seriallo.'703,284.

An object of my invention is to provide a dough mixer that is simple in construction and operation and which requires aminimum of space.

' Another object of my invention is to "811mlnate ceiling structures in bakeries. i

Another object is to provide a device for the purpose stated, especially adaptedfor use in smallbakeries.

These and other objects; are attainedby the means described herein and disclosed inthe accompanying drawings in which:

Fig. 1 is a. frontelevation of'a device? embodymg my'invention.

Fig. 2 is a plan view, on an enlarged scale, of the device shown in Fig. 1-, parts being broken away.-

Fig. 3 is an enlarged sectional view on line 3- -a of Fig. 1.

V Fig. 4 is an enlarged sectional view on lin 44 of Fig. 3.

Fig. 5 is an enlarged of, all of which form details of my invention. Fig. 6 is an" enlarged sectional view on line 66 'ofFig. Fig. 7 isan enlarged 77 of Fig. 6. r v

Fig. 8 is an enlarged sectional view on line 8 8 ofFig-L 7 My. invention comprises a frame'su sectional view'on line fluids which are to-be mixed withthe flour,

. and which tank discharges into the mixing bin. i

The frame 'A comprises a base a, upper- Wardly from which extend the uprights or 7 sides a and a, upon which uprights are 'mounted blocks a" and'a respectively. The blocks a and a h'ave'bearingsmounted upon them adapted to' accommodate the journals a supporting a mixing bin: a.: The journalshave aligned axial bores a through which extends the stub shafts a. Interiorly to the bin, the shafts a carry suitable mixing paddle a, anduponth'e shafts aRadjacent-their ends are mounted the gears 0 A worm upper end of the bin isopen.

. fragmentalend view, of a mixing bin and capsizing'device there pporting a dough mixing bin a, a flour weighingand shaft b are revo wheel segmental is mounted on one side of the bin, and engages a worm a carried-by a shaft a mounted upon the upright (1 The I shaft a" carries a sprocket a about which hand-wheel is actuated to tilt the mixing bin in order to remove'the dough therefrom. The

The driving mechanismB is adapted to actuatethe mixing paddle a and comprises a 'shaft 6 extending through bearings b mountedupon the uprights a and as The shaft 6 has revolubly mounted on it ad- -jacent its outer ends, the sleeves b carrying gears b, which gears engage the a" mountedon shaft 11'.) The shaft 6 has formed in it, adjacentits ends, longitudinal slots 6' extending in 1 parallelismwith the axis of shaft 6 and inwhichjslots are. reciprocally mounted racks b. The sleeves 6' also ca clutch bands Z5". A collar 1)" is keyed to the shaft b and carries a sprocket b. The key bwherewith the collar is secured upon the shaft 6, also serves to retain a clutch shoe 6" in driving engagement with the shaft 6. The clutch shoe is adapted to be expanded and contracted .and to 1 thereby bind and release the clutchband. This expansion and contraction of-the'clutch shoe is effected by means of a gearb contained within the periphery of the clutch shoe and which carries an axial shaft 6 The shaft 6 extends through the gear 6 and its ends are threaded in opposite directions. The gear 6 engages a rack 6.

The ends of shaft 6" engage in the threaded bores 6 in the cylindrical blocks 6 which blocks ride in semi-cylindrical seats 6 formed in opposite portionsof the clutch shoe. From the foregoing it is apparent that r as the rack b 'is reciprocated, the' gear 6 ubly actuated thereby moving. the blocksb toward and'away from the gear 6 with a consequent expanding and j'contracting of the clutch shoe. 'Thecontraction of the shoe may be attained by giving spring qualities to theshoe. A clutch mechanism of the kind described is mounted at each end of theshaft b. Each of the racks b is se-. cured upon a spool b" reciprocally mounted upon the-shaft b, and said spools are enga by forks b" formed on the sleeves b", which ciprocallyythrougli the uprightsa, a and w ich baris pivotally connected by means of a link 6 with the lever arm 6 one endof which ley'er arm is pivotall connected with one of thelsleeves b", and'w llCh lever arm is pivotally connected intermediate its ends with ileeve b by means of a supplemental lever arm I). From the foregoing it is apparent that when the shift bar b is reciprocated, the. racks b are actuated in op osite directions longitudinally of the she 1), thereby causing oint transmission of power "from shaft'b to shaft a thru the clutch devices. The flour weighing mechanism C issupported above'th'e mixing bin by standards'c which are mounted u on the uprights a and a, and which stan ards extend upwardly from said uprights. The standards also carry a cover a -for themixi-ng bin. The cover a" has an aperture awhich registers 'with the mouth a of the flour container or flour bin 0 suspendedyfrom thebar 0 the.

opposite-ends of which bar extends through chain links 0". 'The' chain links c"are supported upon knife edges '0 extending-from the ring 0 which extends about the flour bin and carries'an arm 0 which together with the ring a serve as a scale beam. Knife edges 0 extending from the lingo" engage chain links a suspended from the ring-c mounted upon the standards 0. A connecting rod 0 extends from arm 0 to a scale beam-c mounted upon the standard a. A suitable slide 0 controls communication betweenthe flour bin and the mixing bin. i

\The flour is conveyed to the flour container c by the conveyor system D comprising an intake or dumping bin d which has a spiral screw conveyor extending across its lower portion. The lower portion of the supply in d communicates with a pocket at the base of a-substantiall vertical bucketconveyor d which may be riven thru a clutch d from the sprocket b -on the shaft 6. At its upper end, the bucketconveyor discharges the flour intoa horizontal conveyor d comprising a conduit d within which is revolubly actuated a spiral screw d. The conduit d -discharges into a cylindrical sieve d, havingits' axis in alignment with that of the screw d". The sieve d" is contained within a su'itabe-house or casing d, the lower end of which is open,

whereby communication of the interior of the housing d with the flour bin 0 is established. The shaft (1 which serves as the axis for the screw d extends through .the sieve and carries paddles (1 adapted to agitate the flour within the sieve. The shaft d carries a small gear d" which engages a large gear (1 mounted upon a suitable shaft d". .Asmall gear "as by mounting sprockets al and d" on the shaft d andu on the shaft about which the upper end oft e bucket conveyor travels, respectively, a chain d" extendin about the sprockets d and d"; The sprockets d" and d" and chain (Z are disposed without the conveyor casing d; A bucket carrying chain (1 forming-part of-this bucket conveyor extends about the sprocket al and about a sprocket (1 mounted on the shaft d which extends into the receptacle-d and carries the spiral screw adapted to move the flour into the bucket conveyor casing. suitable clutch mechanism (i controls the shaft (1.

The driving mechanism E comprises a pulley e mounted on the shaft 6., and which pulley may be driven from'nny suitable source of power, such as the motor 6 mounted upon the base a. r

The fluid weighing device F comprises a tank from the lower end of which extends a pipe f the opposite ends of which communicate with theiinterior of the tank f and with a port a forined in the cover'a of the mixing bin. A suitable valve controls the flow through the pipe f 'Ihetank f i's-susended in such manner that the contents may e weighed. The weighing means comprises brackets i mounted upon the standards 0 and from which brackets are suspended chain links i which are engaged by knife edges f formed on the ring f", and from which ring extends an-arm'f' connected with a lever arm ff by any suitable-means such as link f. I The J the brackets f". The other or inner end of the lever arm f 'is connected with a scale beamif by means of a suitable connecting rod f"; The scale beams i and 0 may be mounted upon the frame in any suitable manner in order to render-the cessible. 1

= The operation of my device is as follows: Flour i sdumped into the bin d, generally beams readily acin barrel lots, and is conveyed from the bin d into the bottom of the bucket conveyor casing d from thence-it is carried to the conduit d by means of thebucket conveyor s stem. From the conduit d? the flour is ischargcd into the screenor sieve andtthen after having been sifted is discharged into the flourwveighing bin c When a sufficient quantity of flour is contained within the bin 0 further movement of flour from bin (1,.

through the several conveyors and the sieve then discharged into the mixing bin and the substance within the mixing bin is agitated by means of paddle a. The paddle a is rendered operative or inoperative by operating the shaft b, which shaft in turn actuates the clutches mounted on shaft 6 and which control the transmission of power to combination of a frame, a dough mixer mounted on the frame, a flour weighing 'mechanism mounted on the frame adapted to discharge into the mixer, a fluid weighing device mounted on the frame adapted todischarge into the mixer, a sifter mechanism mounted on the frame discharging into the flour weighing mechanism, a vertical conveyor disposed adjacent the frame adapted to discharge into the sifter mechanism, and

'means mounted on the frame adapted to actuate themixer, the conveyor and the sifter mechanisms.

2. In a device of the class described the combination of a dough mixer comprising a bin or trough, a mixer shaft extending revolubly thru the trough, a mixing paddle within the trough-mounted on the mixing shaft, a second shaft parallel and substantially c'oextensive with the first shaft, intermeshing gears mounted on-said shafts adjacent both theirends, ,a .clutch operative individually upon each pair of gears, a connection between the clutches adaptedin coo eration with the clutches to attain simu taneousi transmimion from the clutches thru their re- 1 bly thru the trough, a mixing paddle within the trough mounted on the mixing shaft, a sec ond shaft parallel and substantially coextennisms.'

sive with the first shaft, inbermeshing gears 5 mounted on said shafts adjacent both their ends, a clutch operative individually upon each pair of gears, a connection between the clutches adapted in cooperation with the clutches to attain simultaneous transmission from the clutch thru their respective pairs of gears, means to drive the second men tioned shaft, a flour weighing mechanism adapted to discharge into the trough, a flour sifting mechanism discharging into the flour weighing mechanism, a conveyor adapted to discharge into the sifting mechanism, and a driving connection between the second mentioned shaft and the conveyor and the sifting'mechanism.

'4. In a device of the class described the combination of a dough mixer, a flour weighing mechanism adapted to discharge into the mixer, a flour sifting mechanism adaptedto discharge into the flour weighing mechanism, a conveyor system adapted to discharge flour into the sifting mechanism, a fluid weighing mechanism adapted to discharge into-the mixer, and means to actuate the conveyor system, the sifting mechanism and the mixer.

5. In adevice of the class described the combination of a doughmixercomprising a bin or trough, a mixer shaft extending revolubly thru the trough adapted to agitate the contents of the trough, gears mounted at both ends of the mixer shaft, a drive shaft having slots extending longitudinally of itself, gears mounted revolubly on the drive shaft, one each of which engages a gear on the mixer shaft, a clutch band fixedly connected with each of the second mentioned ears clutch shoes fixedly mounted on the rive'shaft one each adapted to bind upon one of the clutch bands, a gear revolubly.

mounted on each shoe, a shaft extending thru the lastmentioned gear and adapted to revolvetherewith, the ends of thelastmentioned shaft being threaded in opposite directions, blocks having threaded bores mounted on the opposite ends of said threaded shaft pivotally engaging the shoe, racks reciprocall mounted in the slots in the drive shaft eac engaging one of the gears on the shoes, and a lever adapted to actuate the racks in such ,mannerthat each clutch shoe is brought into binding relation with its respective clutch band simultaneousl with one another..

6. In a device 0 the class described the combination of a frame, a den h mixer mounted on the frame, a flour weighing mechanism mounted on the frame adapted to discharge into the mixer, a sifter mechanism mounted on the frame discharging into the ,flour weighin mechanism, 'a vertical conveyor dispose adjacent the frame adapted to discharge into the sifter mechanism, and means mounted on the frame for actuating the mixer, the conveyer and the sifter mechacontainer carried b 7. Ina device oft e class described the combination of a fra e comprising a base, a dough mixer carried by the frame, a flour the frame adapted to discliar e iiitorthe ou h mixer, a flour sifting mec ianism adapted to discharge into the flour container, a conveyor system adapted to discharge flour into the sifting mechanism, and means supported by thc'base for actuating the conveyor system, the sifting mechanism and the mixer.

I 8. In a device of the class described the combination of a frame, a dough mixer carried by the frame, a flour container carried by the frame adapted to discharge into the mixer, a valve controlling communication between the flour container and the mixer, means associated with the flourjcontainer for weighing the contents of the flour container, a flour sifting mechanism adapted to discharge into the flour container, a conveyor system adapted to discharge into the sifting mechanism, and means to actuate the conveyor system, the sifting mechanismand the mixer. a

9. In a device of the class described the combination of a frame,'a dough mixer on to dischrrge into the wei hingdevice, and

BEST AV;

charge into the weighing device, a conveyordischarging into the sifter, and means for actuating the mixer, the conveyor, and the si fter.

11. Ina device of the class described the combination of a frame, a dough mixer on the frame, alflour hopper carried by the frame above the mixer and adapted to discharge into the mixer, a fluid tank carried by the.

frame adapted to discharge into the mixer, and means for measuring the contents of the hopper and the tank.

. 12. Ina device of the class described the combination of a frame, a dough mixer carried by the frame, a flour weighing device .carried by the frame above the mixer and adapted to discharge into the mixer, a sifter carried b the frame adapted to discharge into the our weighing device, a flour bin, :1 conveyor for moving flour from the bin to the sifter, and means for actuating the conveyor, the sifter and the mixer.

13. In a device of the'class described the combination'of a frame, a dough mixer carried b the frame, a flour weighing device carrie by the frame above the mixer and adapted to discharge into the mixer, a sifter carried b the frame adapted to discharge into the our weighing device, a flour bin, a conveyor for moving flour from the bin to the sifter, a fluid measuring device carried by the'frame ada ted to discharge into the mixer, and means or actuating the conveyor, the sifter and the v mixer.

Sni/Fned at Cincinnati, Ohio, this 25th day of arch, 1924.

' WILLIAM G. KIRCHHQFF ENABLE COPY 

